Wireless sensor network (WSN) of active sensors suffers from serious inter-sensor interference (ISI) and imposes new design and implementation challenges. In this paper, based on the ultrasonic sensor network, two tim...Wireless sensor network (WSN) of active sensors suffers from serious inter-sensor interference (ISI) and imposes new design and implementation challenges. In this paper, based on the ultrasonic sensor network, two time-division based distributed sensor scheduling schemes are proposed to deal with ISI by scheduling sensors periodically and adaptively respectively. Extended Kalman filter (EKF) is used as the tracking algorithm in distributed manner. Simulation results show that the adaptive sensor scheduling scheme can achieve superior tracking accuracy with faster tracking convergence speed.展开更多
A precise localization for mobile target in wireless sensor networks is presented in this letter,where a geometrical relationship is explored to improve the location estimation for mobile target,in-stead of a simple c...A precise localization for mobile target in wireless sensor networks is presented in this letter,where a geometrical relationship is explored to improve the location estimation for mobile target,in-stead of a simple centroid approach.The equations of location compensation algorithm for mobiletarget are derived based on linear trajectory prediction and sensor selective activation.The resultsbased on extensive simulation experiments show that the compensation algorithm gets better per-formance in metrics of quality of tracking and energy efficiency with the change of sensor sensing range,the ratio of sensing range and sensor activation range,and the data sampling rate than traditionalmethods,which means our proposing can achieve better quality-energy tradeoff for mobile target inwireless sensor networks.展开更多
随着“双碳”目标的战略推进,可再生能源在主动配电网(active distribution network,ADN)的大规模消纳提上日程,但受限于调度控制方式和数据交互模式,现有的集中式控制方法无法有效满足分布式能源消纳需求和配电网运行经济性目标。为此...随着“双碳”目标的战略推进,可再生能源在主动配电网(active distribution network,ADN)的大规模消纳提上日程,但受限于调度控制方式和数据交互模式,现有的集中式控制方法无法有效满足分布式能源消纳需求和配电网运行经济性目标。为此,提出了一种基于目标级联法(analytical target cascading,ATC)的主动配电网区域多主体自治协同优化方法,将柔性负荷、分布式电源和储能视为受控单元主体,根据配电网整体的经济性优化目标和微电网区域的局部自治优化需求,设计“ADN主体-节点主体-受控单元主体”的调度框架;并通过ATC处理主体间的共享交互信息,将不同层级的系统解耦为主系统和子系统,达到兼顾整体和局部目标协同优化的效果。最后,通过搭建D9M2和IEEE 33节点配电系统,验证了该方法的有效性。展开更多
目的:基于网络药理学方法预测黄芩治疗慢性鼻窦炎(chronic rhinosinusitis,CRS)的有效成分及作用机制。方法:通过中药系统药理学数据库与分析平台(traditional Chinese medicine systems pharmacology database and analysis platform,T...目的:基于网络药理学方法预测黄芩治疗慢性鼻窦炎(chronic rhinosinusitis,CRS)的有效成分及作用机制。方法:通过中药系统药理学数据库与分析平台(traditional Chinese medicine systems pharmacology database and analysis platform,TCMSP)收集黄芩有效成分,通过PubChem、Swiss Target Prediction数据库搜索并收集黄芩潜在靶点;通过人类基因数据库(the human gene database,GeneCards)等疾病数据库获取黄芩治疗CRS的作用靶点;运用Cytoscape软件构建黄芩治疗CRS的“药物-活性成分-疾病-靶点”网络,通过STRING数据库构建靶点蛋白-蛋白互作网络(protein-protein interactions,PPI)并进行关键靶点的基因本体(gene ontology,GO)和京都基因与基因组百科全书(kyoto encyclopedia of genes and genomes,KEGG)分析。结果:从黄芩中筛选出36个活性成分,得到黄芩与CRS共同靶点129个,涉及PI3K/Akt、RAS、Rap1、趋化因子等48条信号通路。结论:黄芩可通过多成分、多靶点、多途径发挥治疗CRS的作用。展开更多
目的:利用网络药理学研究方法预测白芍治疗阿尔茨海默病的作用机制。方法:利用中药系统药理学数据库和分析平台(traditional Chinese medicine systems pharmacology database and analysis platform,TCMSP)数据库,挖掘白芍有效成分并...目的:利用网络药理学研究方法预测白芍治疗阿尔茨海默病的作用机制。方法:利用中药系统药理学数据库和分析平台(traditional Chinese medicine systems pharmacology database and analysis platform,TCMSP)数据库,挖掘白芍有效成分并预测其作用靶点,通过GeneCards、OMIM等数据库筛选出阿尔茨海默病形成的靶标,运用CytoScape软件构建白芍治疗阿尔茨海默病形成的“成分-靶标-通路-疾病”网络,通过STRING数据库构建靶点蛋白相关作用网络并进行关键靶点的生物功能注释及通路分析。结果:白芍13个有效成分通过干预72个靶点、4条通路发挥治疗阿尔茨海默病的作用。结论:白芍有效成分可能通过抑制炎症、调节免疫功能而达到治疗阿尔茨海默病的作用。展开更多
基金Supported by Science & Engineering Research Council of Singnpore (0521010037)
文摘Wireless sensor network (WSN) of active sensors suffers from serious inter-sensor interference (ISI) and imposes new design and implementation challenges. In this paper, based on the ultrasonic sensor network, two time-division based distributed sensor scheduling schemes are proposed to deal with ISI by scheduling sensors periodically and adaptively respectively. Extended Kalman filter (EKF) is used as the tracking algorithm in distributed manner. Simulation results show that the adaptive sensor scheduling scheme can achieve superior tracking accuracy with faster tracking convergence speed.
基金the Joint Funds of Guangdong-NSFC(U0735003)the National Natural Science Foundation of China(No.60604029,60702081)+2 种基金the Natural ScienceFoundation of Zhejiang Province(No.Y106384)the Sci-ence and Technology Project of Zhejiang Province(No.2007C31038)and the Scientific Research Fund of Zhejiang Provincial Education(No.20061345).
文摘A precise localization for mobile target in wireless sensor networks is presented in this letter,where a geometrical relationship is explored to improve the location estimation for mobile target,in-stead of a simple centroid approach.The equations of location compensation algorithm for mobiletarget are derived based on linear trajectory prediction and sensor selective activation.The resultsbased on extensive simulation experiments show that the compensation algorithm gets better per-formance in metrics of quality of tracking and energy efficiency with the change of sensor sensing range,the ratio of sensing range and sensor activation range,and the data sampling rate than traditionalmethods,which means our proposing can achieve better quality-energy tradeoff for mobile target inwireless sensor networks.
文摘目的:基于网络药理学方法预测黄芩治疗慢性鼻窦炎(chronic rhinosinusitis,CRS)的有效成分及作用机制。方法:通过中药系统药理学数据库与分析平台(traditional Chinese medicine systems pharmacology database and analysis platform,TCMSP)收集黄芩有效成分,通过PubChem、Swiss Target Prediction数据库搜索并收集黄芩潜在靶点;通过人类基因数据库(the human gene database,GeneCards)等疾病数据库获取黄芩治疗CRS的作用靶点;运用Cytoscape软件构建黄芩治疗CRS的“药物-活性成分-疾病-靶点”网络,通过STRING数据库构建靶点蛋白-蛋白互作网络(protein-protein interactions,PPI)并进行关键靶点的基因本体(gene ontology,GO)和京都基因与基因组百科全书(kyoto encyclopedia of genes and genomes,KEGG)分析。结果:从黄芩中筛选出36个活性成分,得到黄芩与CRS共同靶点129个,涉及PI3K/Akt、RAS、Rap1、趋化因子等48条信号通路。结论:黄芩可通过多成分、多靶点、多途径发挥治疗CRS的作用。
文摘目的:利用网络药理学研究方法预测白芍治疗阿尔茨海默病的作用机制。方法:利用中药系统药理学数据库和分析平台(traditional Chinese medicine systems pharmacology database and analysis platform,TCMSP)数据库,挖掘白芍有效成分并预测其作用靶点,通过GeneCards、OMIM等数据库筛选出阿尔茨海默病形成的靶标,运用CytoScape软件构建白芍治疗阿尔茨海默病形成的“成分-靶标-通路-疾病”网络,通过STRING数据库构建靶点蛋白相关作用网络并进行关键靶点的生物功能注释及通路分析。结果:白芍13个有效成分通过干预72个靶点、4条通路发挥治疗阿尔茨海默病的作用。结论:白芍有效成分可能通过抑制炎症、调节免疫功能而达到治疗阿尔茨海默病的作用。